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Note: EPA no longer updates this information, but it may be useful as a reference or resource.

What is Hexachlorobenzene?

HCB is a white crystalline solid which was commonly used as a pesticide until 1965. In the past, HCB was also used as a fungicide to protect seeds of wheat and for a variety of industrial purposes. HCB is a persistent, bioacculumative, and toxic (PBT) pollutants target by EPA.

Why Are We Concerned About HCB?

Because HCB is persistent and bioaccumulative, it stays in our environment for a long time and contaminates our food chain. HCB can cause severe health problems for humans and other wildlife. 

What harmful effects can HCB have on us?

How are we exposed to HCB?

Where can HCB be found?

Although HCB is no longer directly used, it is still found in our environment as a by-product of certain activities and because of past use.

Past uses:

Potential Sources to our Environment:


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